Suggestions Wanted For 408 Stroker Mufflers

Here’s my new problem! I’m changing my 7 1/4 rear end to a 8 3/4” rear end. I want to keep the drums and SBP 14” wheels. How do I make that fit? Do I need a 10” rear drum kit?
Just get yourself a 8 3/4 from an early A body and it should come with the proper hardware (it has been too long for me to remember if im running 9 or 10 inch drums on mine, but they are definitely SBP)